Fluid-motor



, No. 750,337. O PATENTED JAN. 2O, 1904.

J. RBBNTZ. FLUID MOTOR.

APPLICATION FILED JUNE l9, 1903.

No MODEL. SHEETS-SHEET 1.

PATENTED JAN. 26, 1904.

J. F. BENTZ.

FLUID MOTOR.

' APPLICATION FILED JUNE-19, 1903.

2 SHEETS-SHEET 2.

, 2, l m, E E \m\\\ A HE7 i UNITED STATES Patented January 26, 1904.

PATENT OEEICE.

JACOB F. BENTZ, OF SOHENEOTADY, NEW YORK.

FLUID-MOTOR.

SPECIFICATION forming part of Letters Patent No. 750,337, dated January26, 1904.

Application sied June 19,1903. sria1N0.12,212. (No model.)

To a/ZL whom it may concern: Y

Be it known that I, JACOB F. BENTZ, a citi- Zen of the United States,residing at Schenectady, county of Schenectady, and State of New York,have invented certain new and useful Improvements in Fluid-Motors, ofwhich the following is a specification.

The invention relates to such improvements; and it consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon,which form a part of this specication.

Similar characters refer to similar parts in the several figures.

Figure 1 of the drawings is a view in end elevation of the improvedHuid-motor. Fig. 2 is a vertical cross-section of the same, taken on thebroken line 2 2 in Fig. 1. Fig. 3 is a horizontal section of the same,taken on the broken line 3 3 in Fig. 1. Fig. V4 is a plan view of thepiston detached. Fig. 5 is a vertical section of the same, taken on thebroken line 5 5 in Fig. 4. Fig. 6 is a side view of the crankfdisk,crank-pin, and a portion of the crank-shaft shown detached. Figs. 7, 8,and 9 are sections similar to that shown in Fig. 2, illustrating themovements of the piston and crank-disk. Fig. 1() is a central section ofthe countersunk wall of the piston-inclosing'case detached and similarto the section shown in Fig. 3, but slightly modiiied in exterior form.Fig. 11 is an end view of the slide bearing-blocks for the crank-pin.Fig. 12 is an inner side View of one of the bearingblocks detached fromthe other. Fig. 13 is a section of the disk, 'taken on the broken line13 13 in Fig. 6.

In the cross-sectional views shown in Figs.

2, 7, 8, and 9 the screw-threaded bolts are omitted. The case 1, whichforms the piston-chamber, is composed of a rectangular frame 2 and sideplates or walls 3 and 4, clamped upon .opposite sides of the frame bymeans ot the screwthreaded bolts 5 and nuts 6 so as to form asteam-tight chamber within the rectangular frame.

The side wall 4 is provided with a counter sink 8 and a bearing-aperture9, extending from the countersink through the wall, as shown in Figs. 3and 10, adapted to receive the crank-disk 12 and crank-shaft 13, showndetached in Fig. 6, and inserted in the countersunk wall in Fig. 3.

The piston 15 is composed of a rectangular frame (shown in Figs. 4 and5) which is adapted to reciprocate in the piston-chamber, formingpractically a steam-tight connection with the end walls 3 and 4 and twooppositesides of the frame 2, also with the inner face 16 of the disk,which is Hush with the inner surface of the wall 4, as shown. The innersurface 17 of the sides of the piston form a slideway for thebearing-blocks 18, inclosing thecrankpin 20.

The end wall 4 is provided with oppositelydisposed openings 22 and 23,forming portions of inlet-ports for the motor. The openings are eachprovided with a pipe 24, leading to a steam-supply or a supply oi' otheruid under pressure. (Not shown.)

The crank-disk is provided near one edge with an aperture 25, adapted toregister alternately with the openings 22 and 23 during the rotarymovements of the disk and complete the inlet-ports alternately onopposite sides of the piston.

As shown in Fig. 2,l the inlet-port leading from pipe 24 is open andsteam will be admitted at that side oi' the piston, while thepassage-way from the oppositely-disposed pipe at 22 is closed.

As a means for exhausting the steam or other iuid under pressure Iprovide an aperture 26 in the face of the disk leading along thepassage-way 27 (shown in Fig. 13) out through the shaft 13 to theatmosphere. This passage-way forms an eduction-port which is always opento the atmosphere at its outer end.

I prefer to provide the disk with a series of apertures 25, as shown inFigs. 7, 8, and 9.

By increasing the number of apertures steam will be admitted to thepiston-chamber during a longer period and in an increased quantity.

When it is desired to have a quick cuto" and operate the motor by meansof the expansive force of the admitted steam during the greater part ofthe piston-stroke, a small number of apertures would be required.

IOO

By varying the number of apertures the cut-01T can be correspondinglychanged.

The advantage of employing separate apertures instead of a single slothaving the capacity of several apertures is that no passageway is formedfrom one sideof the piston to the other through which the steam canescape, as that part of the disk which lies between the aperturesengages with the piston on one side and with the countersunk wall on theopposite side to form a steam-tight connection.

In Fig. 7 is shown a partial rotary movement of the piston from theposition shown in Fig. 2. As each successive port-aperture 25 passes theport-aperture 23 steam is admitted to that side of the piston, and thesteam which was contained in the piston-chamber on the opposite side ofthe piston exhausts through the eduction-port 26. At the position shownin Fig. 8 the last one of the portopenings 25 registers with theaperture 23, so that steam is still admitted. The farther movement ofthe piston and disk cuts off the supply of steam and permits itsexpansive force to complete the movement of the piston approximately tothe position shown in Fig. 9. In Fig. 9 the piston has reached its limitof movement to the right and the most advanced aperture 25 registerswith the port-aperture 22, so that steam is admitted on that side of thepiston' and the steam which had been admitted on the opposite sideexhausts through the eduction-port 26.

The outer surfaces 30 and 3l of the disk bear upon the contiguoussurfaces 32 and 33 of the wall of the countersink, and the inner face`16of the disk islocated along the path ofthe piston in the same plane withthe inner surface of the wall having the countersink, so that the'pistonengages the disk and countersunk wall to form a steam-tight connection,preventing the passage of steam from one side of the piston to theother. This form of construction dispenses with the use of separatevalves tocontrol the induction and eduction ports, the induction-portsbeing controlled by the disk and the eduction or exhaust port beingcontrolled by the piston which in every position of theJ parts` alwaysseparates the eduction-port form an open induction-port.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a huid-motor', the combination with the piston;and chamber-caseprovided with induction-ports; of a crank-shaft projecting' exteriorlyof the case; a crank-disk let into a case-wall along the path of thepiston and provided with an eduction-port leading to the atmospherethrough the disk and shaft; and operative connections between the diskand piston, substantially as described.

2. In auid-motor, the combination with the chamber-case; and piston; ofa crank-shaft projecting exteriorly of the case; an apertured crank-disklet into a case-wall along the path of the piston and provided with apiston-controlled eduction-port leading to the atmosphere through thedisk and shaft; a disk-controlled induction-port leading into thechamber; and operative connections between the disk and piston,substantially as described.

3. In a fluid-motor, the combination with a reciprocatory piston; and achamber-case having a countersink on the inner side of one of its sidewalls and a pair of induction-ports opening into such countersink onopposite sides thereof; a crank disk rotary in such countersink with itsinner face located along the path of the piston and having aport-aperture, opening into the piston-chamber, adapted to alternatelyregister with the inductionports during the rotary movements of thedisk; and an eduction-port leading from the chamber to the atmosphere;and operative connections between the disk and piston, substantially asdescribed.

4. In a fluid-motor, the combination with a reciprocatory piston and achaInber-case having a countersink on the inner side of one of its sidewalls and a pair of induction-ports opening into such countersink onopposite sides thereof; a crank disk rotary in such countersink with itsinner face located along the path of the piston and in engagementtherewith and having a plurality of port-apertures opening into thepiston-chamber adapted to successively register with the inductionports,alternately, during the rotary movements of the disk; and theeduction-port leading from the chamber to the atmosphere; and operativeconnections between the disk and piston, substantially as described.

5. In a Huid-motor, the combination with the chamber-case andcrank-shaft; of a crank-disk; a piston; connections between the disk andpiston all located within the case and so disposed relatively to eachother that the piston reciprocates across the face of the disk, inengagement therewith, and causes a full rotation of the disk atevery*back-and-forth movement of the piston; and ports having eductionand induction openings in the face of the disk movable into and out ofconnection with the ports and so disposed that one is continuallyseparated from the other by the piston, substantially as described. f

In testimony whereof I have hereunto set my hand this 15th day of June,1903. Y

lJACOB F. BENTZ.

fitnessesz JOHN C. HAMILL,

GEO. A. Moslima.

IOO

IIO

